Oilpan: simplify quota storage callbacks objects.

Source/modules/quota/DeprecatedStorageQuota.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 51 matching lines @@
         return;
     }
 
     SecurityOrigin* securityOrigin = executionContext->securityOrigin();
     if (securityOrigin->isUnique()) {
         executionContext->postTask(StorageErrorCallback::CallbackTask::create(errorCallback, NotSupportedError));
         return;
     }
 
     KURL storagePartition = KURL(KURL(), securityOrigin->toString());
-    OwnPtrWillBeRawPtr<StorageQuotaCallbacks> callbacks = DeprecatedStorageQuotaCallbacksImpl::create(successCallback, errorCallback);
-    Platform::current()->queryStorageUsageAndQuota(storagePartition, storageType, callbacks.release());
+    StorageQuotaCallbacks* callbacks = DeprecatedStorageQuotaCallbacksImpl::create(successCallback, errorCallback);
+    Platform::current()->queryStorageUsageAndQuota(storagePartition, storageType, callbacks);
 }
 
 void DeprecatedStorageQuota::requestQuota(ExecutionContext* executionContext, unsigned long long newQuotaInBytes, StorageQuotaCallback* successCallback, StorageErrorCallback* errorCallback)
 {
     ASSERT(executionContext);
 
     WebStorageQuotaType storageType = static_cast<WebStorageQuotaType>(m_type);
     if (storageType != WebStorageQuotaTypeTemporary && storageType != WebStorageQuotaTypePersistent) {
         // Unknown storage type is requested.
         executionContext->postTask(StorageErrorCallback::CallbackTask::create(errorCallback, NotSupportedError));
         return;
     }
 
     StorageQuotaClient* client = StorageQuotaClient::from(executionContext);
     if (!client) {
         executionContext->postTask(StorageErrorCallback::CallbackTask::create(errorCallback, NotSupportedError));
         return;
     }
 
     client->requestQuota(executionContext, storageType, newQuotaInBytes, successCallback, errorCallback);
 }
 
 } // namespace blink